Distance numbers for my Umbria 100

This is probably going to be completely boring for anyone who isn't me.
But I want to write it down somewhere, so it might as well be here.

bought the bike in late April of 2006 (I have the exact date somewhere)

put the bike computer on about May 28th 2006 (ditto for the date)

as of May 28th 2007, I believe the odometer was about 5550 km (it was
at least 5500 km, and I believe it was a bit more).

at the end of my bike ride home from gaming on April 13th 2008, the
odometer hit its 9999.9 km max distance. Some amount of distance was
lost.

Monday April 14th: +4.2 km on the commute to work, +some unknown
distance commuting to dentist's and back (I think 4-6 km).

Computer totally reset in the afternoon, before my commute home.

May 28th 2008: during the day at work, the odometer read 723.46 km.

Jan 4th 2009: before riding the bike in 2009, I reset the odometer.
Pre-reset it read 4794.2 km. I carried over the April 14 2008 wheel
size of 2170 mm.

May 29th 2009: just at the departure from work, the odometer read
1867.5 km and I had biked 5.229 km that day. (I was just at the
start of St George, so that's about right.)

Two balacing factors:

this includes some amount of distance from walking the bike, especially
on daily commutes (where I walk it a few hundred meters inside the building).

the tire size is set slightly low. I believe I set 2170 mm (700x30 in the
manual) versus 2180 mm (theoretically correct for 700x38 according to
here), but I may have
set lower.

(Did I set it to 2070, the listed 700x18 size? I may have.)

Update, June 9th 2008: I found my gear calculator
program, dating from May 20th 2007, and it uses a wheel size of 2155 mm.

At the April 14 2008 reset, I put the wheel size at 2170 mm. This
appears to be roughly correct within a cm or less, based on rolling
tests at work (where there is a set of 1-foot floor tiles nicely lined
up).

bike computer functions

press left and right for 4 seconds on either display and you get to
total reset. Doesn't seem to flip to anything else.

press left for long enough on the clock/odometer (second screen) and
you can reset the odometer.

somehow I managed to get to set the time without totally resetting
the unit, but I am not sure how any more.

I've now reproduced this. Once the odometer is high enough, press
and hold the left button on the second screen to change the clock;
it may matter that this was shortly after a trip reset.
(At least I assume it requires the odometer to be high enough.)